(Ask for a recommendation vote...) That thing is important! ）

In the evening, Li Zhan, Zhang Damao, Li Sheng, Zhang Gong, and Zhang Jian finally returned home.

Among them, Li Sheng carried a basket of salt mines, Zhang Gong and Zhang Jian carried saltpeter mines, which are really powerful, about more than 100 catties, these three guys are stunned as if they have nothing on their backs, this physical strength, Li Zhan only has envy.

Seeing the salt mine that Li Sheng carried back, everyone was surprised, and they didn't know why they came back with this thing.

But when they heard Zhang Damao say that Li Zhan could actually turn a toxic salt mine into non-toxic salt, everyone showed shocked expressions.

In fact, in Datang... The technology of salt production has been very mature, according to historical records, in the early Tang Dynasty, the process has been greatly improved, and the taste of salt has also been greatly improved at that time, for that time, the technical revolution is still relatively large, the production mode at that time has become more and more specialized, and the degree of fineness of salt is also very high.

At that time, there was a method of making it in five steps, and it can be said that the industrialization of mass production was realized, and the final efficiency began to become higher.

But while their technology is mature, then why ... The army of the Tang Dynasty still needs to use vinegar cloth?

What is vinegar cloth... It is mentioned in Tang bricks, that is, cloth boiled with vinegar. When eating, as long as you put the "vinegar cloth" in the water, the vinegar smell inside will come out. This is a way to store vinegar, after all, cloth is far easier to carry than liquid vinegar.

Especially when marching and fighting, it is not convenient to carry all kinds of bottles and cans of spices. Therefore, I came up with a means of storage such as "vinegar cloth", which is not only easy to carry but also can meet people's requirements for the taste of food.

When eating, the soldiers only need to cut a small piece of cloth soaked in vinegar and cook it together with the military rations, and it will not take long to eat a delicious meal.

However, it doesn't taste very good, and if you eat it, you may vomit.

What is the reason why the technology is mature but still need to use vinegar cloth... The reason is that there is a difference between mature technology and mass production, and mature technology can produce salt, even close to modern fine salt, but its quantity is not available.

In the Tang Dynasty, there were three methods of making salt, the first sea salt, the second pool salt, and the third well salt.

Sea salt is to evaporate some seawater with high salt content, generally using the sun and natural evaporation, etc., and then some of the salt is cleared to remove impurities and remove some of the impurities.

Pond salt is salt taken from saltwater lakes and is made in the same way as sea salt, and of course in the same way.

And finally, well salt... By drilling wells, underground brine is extracted (naturally formed or generated after salt mine water injection), and the salt made is called well salt, and the shaft that produces well salt is called salt well.

The first two simply rely on the sun, and the back one should be sunk, and when sinking the well, the "slotted" drill bit is used to crush the rock by impact, inject water or use groundwater, and draw out the cuttings and water with a bamboo tube.

The diameter of Zhuo tube well is only the size of a bowl, and the wall of the well is not easy to collapse. The Tang people also went to the knots of the big Nan bamboo, socketed the end and end, wrapped the hemp rope outside, coated with putty, and went down to the well as a casing to prevent the wall of the well from collapsing and fresh water from soaking. When taking brine, use fine bamboo as a brine tube, insert it into the casing, the bottom of the cylinder is made of cooked skin as the opening and closing valve, a tube can draw several buckets of brine, a large wooden frame is erected on the well, and the brine is extracted with a roller and a car plate.

It's even harder...

So although the technology is proficient, the amount of salt in Datang can't be raised.

What everyone doesn't know is that during the Tang Dynasty, that is, during Li Shimin's Zhenguan period, no salt tax was charged, why... It's that there is little salt, and the imperial court wants to encourage people to make salt, and who will make salt if you collect taxes.

Therefore, during the Zhenguan period, the operation of this salt was that the salt was made by the people, and after the salt was prepared, the government would collect it... When it's ready... Then the government will add some price and sell it to merchants who hold similar salt leads, and then follow wherever the merchants go to sell it.

The price of salt is not high ... That's true, but salt is scarce, and it's a bit difficult for your people to get their hands on salt, or a large supply from the army, to be honest.

The salt that the Li family eats is also the kind of sea salt that is large... It's cheap and not tasty, but it's hard to buy.

........................

"Zhan'er... Do you know how to make salt? Li Dafu looked at Li Zhan in surprise.

Li Zhan looked at everyone's shocked looks, but said very lightly: "This is very simple, where is it, it is just a small knowledge, some children understand." ”

"Wow...!" Li Zhan's understatement made everyone present admire.

"Zhan'er... Or we'll make some salt in the evening... Anyway, the salt in the house is almost gone. Li Dafu asked with a smile.

"Good...!" Li Zhan nodded.

In this way, after dinner, Li Zhan began to prepare for salt... In fact, salt production is very simple, first of all, the first step is to crush all the salt ore, after crushing, put the crushed salt ore into the barrel, and then filter... Removal of impurities from salt mines.

Then put the brine with the impurities removed, put it in the pot, steam it at high temperature, boil the water in the pot dry, and soon... The crystals at the bottom of the pot are edible table salt.

From around 18 o'clock in the evening, it was busy until the night... Finally, Li Zhan's first pot of salt came out.

When the lid of the pot was opened, everyone was dumbfounded, because the salt in the pot was the finest salt... Li Dafu was the first to shout in surprise: "It's fine salt... I can use the best fine salt to brush my teeth. ”

Brushing teeth in the Tang Dynasty was very simple, that is, brushing with your fingers dipped in some salt, and the salt that can brush your teeth is definitely the best among salts.

The salt was used by the royal family and dignitaries.

"If this is taken out and sold, at least one pound will be consistent...!" Zhang Hei said happily.

However, at this time, Zhang Damao stopped him loudly: "Don't think about it for me, the imperial court prohibits the sale of illicit salt, we can keep this salt for food, but it must not be used for sale."

Otherwise, be careful that I break your legs. ”

Although he is already a lot older, Zhang Damao's majesty is still there, and he was scolded by Zhang Damao, Zhang Hei, and Zhang Shun immediately shrank his head.

At this time, Li Zhan came out with a smile and said, "Grandpa... Uncles are saying, okay... The salt has already been made, and we use it at home and don't take it out.

We're still making popsicles, and it's getting hotter and hotter, so we need to make preparations as soon as possible, so that we can make a lot of money when it's hot. ”

"Good...!" Li Zhan's words made everyone smile and nod.

............................

Salt making is just an episode... Li Zhan's most important thing now is to make popsicles, which is his main business.

At the beginning of the next day, Li Zhan led the whole family to work hard and began to work hard for popsicles, and finally after five days, everything was ready, and Li Zhan officially came to the popsicle business of the Tang Dynasty.

...............................